tsutaj (@_TTJR_) Hokkaido University M1 October 16, 2018 tsutaj (Hokkaido Univ.) October 16, 2018 1 / 78 1 2 ϕ Uncommon Ball and Boxes 3 lahub and Permutations 3 LCM Rush Enumeration 4 (2) Rotated Palindromes Everything on It 5 tsutaj (Hokkaido Univ.) October 16, 2018 2 / 78 ▶ 積集合 (intersection) 和集合 (union) tsutaj (Hokkaido Univ.) October 16, 2018 3 / 78 ▶ ▶ ▶ (intersection) ▶ (union) 1 積集合 (inter